... -220v,0-120%, adjustment fineness:0.01 full rangeCurrent measurement range:0-100a,0-120%, adjustment fineness:0.0001Phase shift:0- ... power supply:220va±10%,50hz, ma. Power consumption:1,500vaOn-line calibration can be conducted on 1p2w single-loop watthour meter ... and also off-line calibration on the three kind of loops such as 1 ...